Running Take Five from a Locked iOS Device

Take Five's timer doesn’t count down when I lock
my device. Why not?

If your device is not connected to a power source, it goes into
a “power save” mode 15 seconds after the screen goes
dark. The timer stops when this happens and there’s nothing
the app can do to prevent it. On iOS 4, Take Five can delay the
power save mode, but only for 5 minutes.

If you experience this problem, there are two workarounds:

Don’t use power switch and just let Take Five run
normally. You should also adjust the “auto lock”
feature to avoid the power save mode. Go to the Settings app and
select General > Auto-Lock > 5 Minutes.

Leave your iPhone or iPod touch connected to a power source so
that the power save mode is not activated.